18280512 has 112 divisors (see below), whose sum is σ = 54864000. Its totient is φ = 5967360.

The previous prime is 18280487. The next prime is 18280517. The reversal of 18280512 is 21508281.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (18280517) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 122614 + ... + 122762.

Almost surely, 2^18280512 is an apocalyptic number.

18280512 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18280512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27432000).

18280512 is an abundant number, since it is smaller than the sum of its proper divisors (36583488).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18280512 is a wasteful number, since it uses less digits than its factorization.

18280512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 241 (or 225 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 27.

The square root of 18280512 is about 4275.5715407417. The cubic root of 18280512 is about 263.4285158598.

Adding to 18280512 its reverse (21508281), we get a palindrome (39788793).

The spelling of 18280512 in words is "eighteen million, two hundred eighty thousand, five hundred twelve".